If you want to use the Octoparse Data Export API, you will need to hold a Standard or Professional account with at least one runnable task set up. Documentation: http://dataapi.octoparse.com/help
If you want to use the Octoparse Advanced API, you will need to hold a Professional account with at least one runnable task set up. Documentation: http://advancedapi.octoparse.com/help
You can easily retrieve extracted data, task information and even control tasks (Advanced API only) by connecting to the Octoparse API, realizing efficient data extraction by coordinating with your own application.